Focus was on pistils of leftmost flower at maximum aperture, using live view at maximum magnification. Best I could achieve. Camera was not moved and conditions were not windy. Camera was on a very stable tripod, so any focusing error is mine, representing my own error margin.

Tripod has been moved and angle of view is a bit different. Moving the tripod was necessary to compensate for differences in focal length.

As Thierry pointed out there is a difference in focus between the Zeiss shot and the Minolta shot. I was trying to focus on the pistils in all images, but it seems I missed. The lower part of the pistil in the Zeiss image is in better focus than the top. The main question I asked if there were major differences in the way the lenses draw. If there are differences, they are not very obvious to me.